• 코드:
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<!DOCTYPE html>
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<html lang="ko">
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​
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<head>
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    <meta charset="UTF-8">
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    <title>JavaScript Number Method</title>
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</head>
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​
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<body>
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​
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    <h1>toExponential() 메소드</h1>
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​
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    <script>
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        var num = 12.3456; // Number 인스턴스를 생성함.
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​
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        document.write(num.toExponential() + "<br>");       // 1.23456e+1
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        document.write(num.toExponential(2) + "<br>");      // 1.23e+1
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        document.write(num.toExponential(4) + "<br>");      // 1.2346e+1
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        document.write(12.3456.toExponential());            // 1.23456e+1
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    </script>
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</body>
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​
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</html>